Zinc barium titanate system ceramic low temperature sintering material and preparation method thereof

Abstract

The present invention discloses a zinc barium titanate system microwave dielectric ceramic material and a preparation method thereof, and relates to an electronic material technology. The chemical composition of the material is (1-x)BaTi4O9-xBaZn2Ti4O11-yM, wherein x is more than or equal to 0.15 and is less than or equal to 0.25 (molar ratio ), M is a firing reduction agent, y is more than or equal to 0.0531 and is less than or equal to 0.1005 (weight ratio), components of the firing reduction agent comprise, by weight, 44.25-53.47% of Li2CO3, 4.82-9.19% of SiO2, 33.24-37.71% of B2O3, 0.88-0.94% of ZnO, 3.75-9.83% of Al2O3, and 0.3-1% of additives such as MnCO3 and CuO, and a weight ratio of the MnCO3 to the CuO is 3:4-3:6. The present invention further provides the concrete method for producing the material. The prepared microwave dielectric ceramic has characteristics of low sintering temperature (less than or equal to 900 DEG C) and excellent dielectric property, and can be used for manufacturing of low temperature co-firing ceramic systems, multilayer dielectric resonators, microwave antennas, filters and other microwave devices, wherein the excellent dielectric property comprises that: a dielectric constant of 20-30 is adjustable, a quality factor is high, and a resonant frequency temperature coefficient is small.

Description

technical field [0001] The invention belongs to the field of electronic ceramics and its manufacture, and relates to a zinc barium titanate system ceramic microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave (300MHz to 300GHz) frequency band circuits and perform one or more functions. They are key basic materials in modern communication technology and are widely used in dielectric resonators and filters. , dielectric substrate, dielectric waveguide circuit, microwave capacitor, duplexer, antenna and other microwave components. [0003] With the continuous development of electronic information technology in the direction of high frequency and digitalization, the requirements for miniaturization, integration and modularization of components are becoming more and more urgent. LTCC (Low Temperature Co-fired Ceramics) has become one ...

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Problems solved by technology

One of the traditional methods is to incorporate low melting point oxides, such as B 2 o 3 and V 2 o 5 , while the free B 2 o 3 and V 2 o 5 In the late casting process, the viscosity of the slurry is too high and unstable, which limits its practical application; another method is to add low-melting glass, but the existence of the glass phase greatly increases the dielectric loss of the material, and the glass is in The performance is unstable during the smelting process and the cost is high, which greatly limits the quality of BaO-ZnO-TiO 2 Development of system materials and microwave multilayer devices

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